Encoding is wrong as you already figured it out, so from Excel try to save it with another encoding. There should be UTF-8 CSV option.
But UTF-8 is not the correct encoding either. Original CSV has UTF-16 Little Endian (sometimes called UCS-2).
So try save it as UTF-8, then open it in Notepad++, convert encoding to UCS-2, save it and then try to import it.
PS: I didn't test it, it just a theory.
Thank you for your help. But we used the old copy paste method to solve this.
I am going to try this next time though.